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<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> *    Copyright 2009 Simone Tripodi</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *    Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *    you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> *    You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *       <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *    Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> *    distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> *    See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> *    limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> com.memos2;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Future;
<a name="21" href="#21">21</a>  
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> net.spy.memcached.MemcachedClient;
<a name="23" href="#23">23</a>  
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.logging.Log;
<a name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.logging.LogFactory;
<a name="26" href="#26">26</a>  
<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> com.opensymphony.oscache.base.Config;
<a name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> com.opensymphony.oscache.base.persistence.CachePersistenceException;
<a name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> com.opensymphony.oscache.base.persistence.PersistenceListener;
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment">/**</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * A memcached based {@link PersistenceListener} for OSCache.</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> *</em>
<a name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * @author Simone Tripodi (simone.tripodi)</em>
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * @version $Id: MemcachedListener.java 84 2009-12-15 08:35:31Z simone.tripodi $</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> */</em>
<a name="37" href="#37">37</a>  @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="38" href="#38">38</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../com/memos2/MemcachedListener.html">MemcachedListener</a> implements PersistenceListener {
<a name="39" href="#39">39</a>  
<a name="40" href="#40">40</a>      <em class="jxr_javadoccomment">/**</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment">     * This class log.</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     */</em>
<a name="43" href="#43">43</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Log log = LogFactory.getLog(<strong class="jxr_keyword">this</strong>.getClass());
<a name="44" href="#44">44</a>  
<a name="45" href="#45">45</a>      <em class="jxr_javadoccomment">/**</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">     * The Memcached client configuration.</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment">     */</em>
<a name="48" href="#48">48</a>      <strong class="jxr_keyword">private</strong> <a href="../../com/memos2/MemcachedConfiguration.html">MemcachedConfiguration</a> memcachedConfiguration;
<a name="49" href="#49">49</a>  
<a name="50" href="#50">50</a>      <em class="jxr_javadoccomment">/**</em>
<a name="51" href="#51">51</a>  <em class="jxr_javadoccomment">     * The Memcached client reference.</em>
<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment">     */</em>
<a name="53" href="#53">53</a>      <strong class="jxr_keyword">private</strong> MemcachedClient memcachedClient;
<a name="54" href="#54">54</a>  
<a name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em>
<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     */</em>
<a name="58" href="#58">58</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear() <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="59" href="#59">59</a>          <em class="jxr_comment">// TODO is there a way to clean memcached?!?</em>
<a name="60" href="#60">60</a>      }
<a name="61" href="#61">61</a>  
<a name="62" href="#62">62</a>      <em class="jxr_javadoccomment">/**</em>
<a name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     */</em>
<a name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> PersistenceListener configure(<strong class="jxr_keyword">final</strong> Config config) {
<a name="66" href="#66">66</a>          <strong class="jxr_keyword">this</strong>.memcachedConfiguration = MemcachedConfigurationBuilder.getInstance().parseConfiguration(config);
<a name="67" href="#67">67</a>  
<a name="68" href="#68">68</a>          <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="69" href="#69">69</a>              <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Creating new memcached client using configuration "</span>
<a name="70" href="#70">70</a>                      + <strong class="jxr_keyword">this</strong>.memcachedConfiguration);
<a name="71" href="#71">71</a>          }
<a name="72" href="#72">72</a>  
<a name="73" href="#73">73</a>          <strong class="jxr_keyword">try</strong> {
<a name="74" href="#74">74</a>              <strong class="jxr_keyword">this</strong>.memcachedClient = <strong class="jxr_keyword">new</strong> MemcachedClient(<strong class="jxr_keyword">this</strong>.memcachedConfiguration.getConnectionFactory(), <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getAddresses());
<a name="75" href="#75">75</a>          } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a name="76" href="#76">76</a>              String message = <span class="jxr_string">"Impossible to instantiate a new memecached client instance, see nested exceptions"</span>;
<a name="77" href="#77">77</a>              <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isFatalEnabled()) {
<a name="78" href="#78">78</a>                  <strong class="jxr_keyword">this</strong>.log.fatal(message, e);
<a name="79" href="#79">79</a>              }
<a name="80" href="#80">80</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(message, e);
<a name="81" href="#81">81</a>          }
<a name="82" href="#82">82</a>  
<a name="83" href="#83">83</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="84" href="#84">84</a>      }
<a name="85" href="#85">85</a>  
<a name="86" href="#86">86</a>      <em class="jxr_javadoccomment">/**</em>
<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     */</em>
<a name="89" href="#89">89</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isGroupStored(String groupName) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="90" href="#90">90</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.retrieveGroup(groupName) != <strong class="jxr_keyword">null</strong>;
<a name="91" href="#91">91</a>      }
<a name="92" href="#92">92</a>  
<a name="93" href="#93">93</a>      <em class="jxr_javadoccomment">/**</em>
<a name="94" href="#94">94</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="95" href="#95">95</a>  <em class="jxr_javadoccomment">     */</em>
<a name="96" href="#96">96</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isStored(String key) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="97" href="#97">97</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.retrieve(key) != <strong class="jxr_keyword">null</strong>;
<a name="98" href="#98">98</a>      }
<a name="99" href="#99">99</a>  
<a name="100" href="#100">100</a>     <em class="jxr_javadoccomment">/**</em>
<a name="101" href="#101">101</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="102" href="#102">102</a> <em class="jxr_javadoccomment">     */</em>
<a name="103" href="#103">103</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> remove(String key) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="104" href="#104">104</a>         String keyString = <strong class="jxr_keyword">this</strong>.encryptKey(key);
<a name="105" href="#105">105</a> 
<a name="106" href="#106">106</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="107" href="#107">107</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Flushing key '"</span>
<a name="108" href="#108">108</a>                     + keyString
<a name="109" href="#109">109</a>                     + <span class="jxr_string">"'"</span>);
<a name="110" href="#110">110</a>         }
<a name="111" href="#111">111</a> 
<a name="112" href="#112">112</a>         <strong class="jxr_keyword">this</strong>.memcachedClient.delete(keyString);
<a name="113" href="#113">113</a>     }
<a name="114" href="#114">114</a> 
<a name="115" href="#115">115</a>     <em class="jxr_javadoccomment">/**</em>
<a name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="117" href="#117">117</a> <em class="jxr_javadoccomment">     */</em>
<a name="118" href="#118">118</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> removeGroup(String groupName) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="119" href="#119">119</a>         String groupKey = <strong class="jxr_keyword">this</strong>.encryptGroupKey(groupName);
<a name="120" href="#120">120</a> 
<a name="121" href="#121">121</a>         <em class="jxr_comment">// remove all group entries</em>
<a name="122" href="#122">122</a>         Set group = (Set) <strong class="jxr_keyword">this</strong>.retrieveFromMemcached(groupKey);
<a name="123" href="#123">123</a>         <strong class="jxr_keyword">for</strong> (Object key : group) {
<a name="124" href="#124">124</a>             <strong class="jxr_keyword">this</strong>.remove((String) key);
<a name="125" href="#125">125</a>         }
<a name="126" href="#126">126</a> 
<a name="127" href="#127">127</a>         <em class="jxr_comment">// remove the group entry</em>
<a name="128" href="#128">128</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="129" href="#129">129</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Flushing group '"</span>
<a name="130" href="#130">130</a>                     + groupKey
<a name="131" href="#131">131</a>                     + <span class="jxr_string">"'"</span>);
<a name="132" href="#132">132</a>         }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>         <strong class="jxr_keyword">this</strong>.memcachedClient.delete(groupKey);
<a name="135" href="#135">135</a>     }
<a name="136" href="#136">136</a> 
<a name="137" href="#137">137</a>     <em class="jxr_javadoccomment">/**</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">     */</em>
<a name="140" href="#140">140</a>     <strong class="jxr_keyword">public</strong> Object retrieve(String key) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="141" href="#141">141</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.retrieveFromMemcached(<strong class="jxr_keyword">this</strong>.encryptKey(key));
<a name="142" href="#142">142</a>     }
<a name="143" href="#143">143</a> 
<a name="144" href="#144">144</a>     <em class="jxr_javadoccomment">/**</em>
<a name="145" href="#145">145</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="146" href="#146">146</a> <em class="jxr_javadoccomment">     */</em>
<a name="147" href="#147">147</a>     <strong class="jxr_keyword">public</strong> Set retrieveGroup(String groupName) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="148" href="#148">148</a>         <strong class="jxr_keyword">return</strong> (Set) <strong class="jxr_keyword">this</strong>.retrieveFromMemcached(<strong class="jxr_keyword">this</strong>.encryptGroupKey(groupName));
<a name="149" href="#149">149</a>     }
<a name="150" href="#150">150</a> 
<a name="151" href="#151">151</a>     <em class="jxr_javadoccomment">/**</em>
<a name="152" href="#152">152</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="153" href="#153">153</a> <em class="jxr_javadoccomment">     */</em>
<a name="154" href="#154">154</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> store(String key, Object obj) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="155" href="#155">155</a>         <strong class="jxr_keyword">this</strong>.storeInMemcached(<strong class="jxr_keyword">this</strong>.encryptKey(key), obj);
<a name="156" href="#156">156</a>     }
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>     <em class="jxr_javadoccomment">/**</em>
<a name="159" href="#159">159</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a name="160" href="#160">160</a> <em class="jxr_javadoccomment">     */</em>
<a name="161" href="#161">161</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> storeGroup(String groupName, Set group) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="162" href="#162">162</a>         <strong class="jxr_keyword">this</strong>.storeInMemcached(<strong class="jxr_keyword">this</strong>.encryptGroupKey(groupName), group);
<a name="163" href="#163">163</a>     }
<a name="164" href="#164">164</a> 
<a name="165" href="#165">165</a>     <em class="jxr_javadoccomment">/**</em>
<a name="166" href="#166">166</a> <em class="jxr_javadoccomment">     * Retrieves an object from Memcached identified by the passed key.</em>
<a name="167" href="#167">167</a> <em class="jxr_javadoccomment">     *</em>
<a name="168" href="#168">168</a> <em class="jxr_javadoccomment">     * @param key the object unique identifier.</em>
<a name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * @return the identified object if present, null otherwise.</em>
<a name="170" href="#170">170</a> <em class="jxr_javadoccomment">     * @throws CachePersistenceException if any error occurs.</em>
<a name="171" href="#171">171</a> <em class="jxr_javadoccomment">     */</em>
<a name="172" href="#172">172</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object retrieveFromMemcached(<strong class="jxr_keyword">final</strong> String key) <strong class="jxr_keyword">throws</strong> CachePersistenceException {
<a name="173" href="#173">173</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="174" href="#174">174</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Retrieving cached object with key '"</span>
<a name="175" href="#175">175</a>                     + key
<a name="176" href="#176">176</a>                     + <span class="jxr_string">"'"</span>);
<a name="177" href="#177">177</a>         }
<a name="178" href="#178">178</a> 
<a name="179" href="#179">179</a>         Object obj = <strong class="jxr_keyword">null</strong>;
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isUsingAsyncGet()) {
<a name="182" href="#182">182</a>             Future&lt;Object&gt; future = <strong class="jxr_keyword">this</strong>.memcachedClient.asyncGet(key);
<a name="183" href="#183">183</a> 
<a name="184" href="#184">184</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isCompressionEnabled()) {
<a name="185" href="#185">185</a>                 future = <strong class="jxr_keyword">this</strong>.memcachedClient.asyncGet(key, <strong class="jxr_keyword">new</strong> <a href="../../com/memos2/CompressorTranscoder.html">CompressorTranscoder</a>());
<a name="186" href="#186">186</a>             } <strong class="jxr_keyword">else</strong> {
<a name="187" href="#187">187</a>                 future = <strong class="jxr_keyword">this</strong>.memcachedClient.asyncGet(key);
<a name="188" href="#188">188</a>             }
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>             <strong class="jxr_keyword">try</strong> {
<a name="191" href="#191">191</a>                 obj = future.get(<strong class="jxr_keyword">this</strong>.memcachedConfiguration.getTimeout(),
<a name="192" href="#192">192</a>                         <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getTimeUnit());
<a name="193" href="#193">193</a>             } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="194" href="#194">194</a>                 future.cancel(false);
<a name="195" href="#195">195</a>                 String errorMessage = <span class="jxr_string">"Impossible to retrieve object from memcache identified by '"</span>
<a name="196" href="#196">196</a>                     + key
<a name="197" href="#197">197</a>                     + <span class="jxr_string">"' using the async get"</span>;
<a name="198" href="#198">198</a> 
<a name="199" href="#199">199</a>                 <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isErrorEnabled()) {
<a name="200" href="#200">200</a>                     <strong class="jxr_keyword">this</strong>.log.error(errorMessage, e);
<a name="201" href="#201">201</a>                 }
<a name="202" href="#202">202</a> 
<a name="203" href="#203">203</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> CachePersistenceException(errorMessage);
<a name="204" href="#204">204</a>             }
<a name="205" href="#205">205</a>         } <strong class="jxr_keyword">else</strong> {
<a name="206" href="#206">206</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isCompressionEnabled()) {
<a name="207" href="#207">207</a>                 obj = <strong class="jxr_keyword">this</strong>.memcachedClient.get(key, <strong class="jxr_keyword">new</strong> <a href="../../com/memos2/CompressorTranscoder.html">CompressorTranscoder</a>());
<a name="208" href="#208">208</a>             } <strong class="jxr_keyword">else</strong> {
<a name="209" href="#209">209</a>                 obj = <strong class="jxr_keyword">this</strong>.memcachedClient.get(key);
<a name="210" href="#210">210</a>             }
<a name="211" href="#211">211</a>         }
<a name="212" href="#212">212</a> 
<a name="213" href="#213">213</a>         <strong class="jxr_keyword">return</strong> obj;
<a name="214" href="#214">214</a>     }
<a name="215" href="#215">215</a> 
<a name="216" href="#216">216</a>     <em class="jxr_javadoccomment">/**</em>
<a name="217" href="#217">217</a> <em class="jxr_javadoccomment">     * Stores and object identified by the key into Memcached.</em>
<a name="218" href="#218">218</a> <em class="jxr_javadoccomment">     *</em>
<a name="219" href="#219">219</a> <em class="jxr_javadoccomment">     * @param key the object identifier.</em>
<a name="220" href="#220">220</a> <em class="jxr_javadoccomment">     * @param obj the object has to be stored.</em>
<a name="221" href="#221">221</a> <em class="jxr_javadoccomment">     */</em>
<a name="222" href="#222">222</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> storeInMemcached(<strong class="jxr_keyword">final</strong> String key, <strong class="jxr_keyword">final</strong> Object obj) {
<a name="223" href="#223">223</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="224" href="#224">224</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Storing object ('"</span>
<a name="225" href="#225">225</a>                     + key
<a name="226" href="#226">226</a>                     + <span class="jxr_string">"', ="</span>
<a name="227" href="#227">227</a>                     + obj
<a name="228" href="#228">228</a>                     + <span class="jxr_string">")"</span>);
<a name="229" href="#229">229</a>         }
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>         Future&lt;Boolean&gt; future;
<a name="232" href="#232">232</a> 
<a name="233" href="#233">233</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isCompressionEnabled()) {
<a name="234" href="#234">234</a>             future = <strong class="jxr_keyword">this</strong>.memcachedClient.set(key,
<a name="235" href="#235">235</a>                     <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getExpiration(),
<a name="236" href="#236">236</a>                     obj,
<a name="237" href="#237">237</a>                     <strong class="jxr_keyword">new</strong> <a href="../../com/memos2/CompressorTranscoder.html">CompressorTranscoder</a>());
<a name="238" href="#238">238</a>         } <strong class="jxr_keyword">else</strong> {
<a name="239" href="#239">239</a>             future = <strong class="jxr_keyword">this</strong>.memcachedClient.set(key,
<a name="240" href="#240">240</a>                     <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getExpiration(),
<a name="241" href="#241">241</a>                     obj);
<a name="242" href="#242">242</a>         }
<a name="243" href="#243">243</a> 
<a name="244" href="#244">244</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="245" href="#245">245</a>             <strong class="jxr_keyword">try</strong> {
<a name="246" href="#246">246</a>                 <strong class="jxr_keyword">boolean</strong> status = future.get(<strong class="jxr_keyword">this</strong>.memcachedConfiguration.getTimeout(),
<a name="247" href="#247">247</a>                         <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getTimeUnit());
<a name="248" href="#248">248</a> 
<a name="249" href="#249">249</a>                 <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Status after set object identified by '"</span>
<a name="250" href="#250">250</a>                             + key
<a name="251" href="#251">251</a>                             + <span class="jxr_string">"' is '"</span>
<a name="252" href="#252">252</a>                             + status
<a name="253" href="#253">253</a>                             + <span class="jxr_string">"'"</span>);
<a name="254" href="#254">254</a>             } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="255" href="#255">255</a>                 future.cancel(false);
<a name="256" href="#256">256</a> 
<a name="257" href="#257">257</a>                 <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isWarnEnabled()) {
<a name="258" href="#258">258</a>                     <strong class="jxr_keyword">this</strong>.log.warn(<span class="jxr_string">"Impossible to know status after setting object identified by '"</span>
<a name="259" href="#259">259</a>                             + key
<a name="260" href="#260">260</a>                             + <span class="jxr_string">"'"</span>, e);
<a name="261" href="#261">261</a>                 }
<a name="262" href="#262">262</a>             }
<a name="263" href="#263">263</a>         }
<a name="264" href="#264">264</a>     }
<a name="265" href="#265">265</a> 
<a name="266" href="#266">266</a>     <em class="jxr_javadoccomment">/**</em>
<a name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * Encrypts a key if the encryption is enabled, the same string otherwise.</em>
<a name="268" href="#268">268</a> <em class="jxr_javadoccomment">     *</em>
<a name="269" href="#269">269</a> <em class="jxr_javadoccomment">     * @param key the key has to be encrypted.</em>
<a name="270" href="#270">270</a> <em class="jxr_javadoccomment">     * @return the encrypted key if the encryption is enabled,</em>
<a name="271" href="#271">271</a> <em class="jxr_javadoccomment">     *         the same string otherwise.</em>
<a name="272" href="#272">272</a> <em class="jxr_javadoccomment">     */</em>
<a name="273" href="#273">273</a>     <strong class="jxr_keyword">private</strong> String encryptKey(<strong class="jxr_keyword">final</strong> String key) {
<a name="274" href="#274">274</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isEncryptKeys()) {
<a name="275" href="#275">275</a>             String encrypted = <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getKeyPrefix() + Integer.toHexString(key.hashCode());
<a name="276" href="#276">276</a> 
<a name="277" href="#277">277</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="278" href="#278">278</a>                 <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Original key '"</span>
<a name="279" href="#279">279</a>                         + key
<a name="280" href="#280">280</a>                         + <span class="jxr_string">"' encrypted to '"</span>
<a name="281" href="#281">281</a>                         + encrypted
<a name="282" href="#282">282</a>                         + <span class="jxr_string">"'"</span>);
<a name="283" href="#283">283</a>             }
<a name="284" href="#284">284</a> 
<a name="285" href="#285">285</a>             <strong class="jxr_keyword">return</strong> encrypted;
<a name="286" href="#286">286</a>         }
<a name="287" href="#287">287</a> 
<a name="288" href="#288">288</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="289" href="#289">289</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"No need to encrypt key '"</span>
<a name="290" href="#290">290</a>                     + key
<a name="291" href="#291">291</a>                     + <span class="jxr_string">"', just returning the original"</span>);
<a name="292" href="#292">292</a>         }
<a name="293" href="#293">293</a> 
<a name="294" href="#294">294</a>         <strong class="jxr_keyword">return</strong> key;
<a name="295" href="#295">295</a>     }
<a name="296" href="#296">296</a> 
<a name="297" href="#297">297</a>     <em class="jxr_javadoccomment">/**</em>
<a name="298" href="#298">298</a> <em class="jxr_javadoccomment">     * Encrypts a group key if the encryption is enabled,</em>
<a name="299" href="#299">299</a> <em class="jxr_javadoccomment">     * the same string otherwise.</em>
<a name="300" href="#300">300</a> <em class="jxr_javadoccomment">     *</em>
<a name="301" href="#301">301</a> <em class="jxr_javadoccomment">     * @param group the group key has to be encrypted.</em>
<a name="302" href="#302">302</a> <em class="jxr_javadoccomment">     * @return the encrypted key if the encryption is enabled,</em>
<a name="303" href="#303">303</a> <em class="jxr_javadoccomment">     *         the same string otherwise.</em>
<a name="304" href="#304">304</a> <em class="jxr_javadoccomment">     */</em>
<a name="305" href="#305">305</a>     <strong class="jxr_keyword">private</strong> String encryptGroupKey(<strong class="jxr_keyword">final</strong> String group) {
<a name="306" href="#306">306</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.memcachedConfiguration.isEncryptKeys()) {
<a name="307" href="#307">307</a>             String encrypted = <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getKeyPrefix()
<a name="308" href="#308">308</a>                     + <strong class="jxr_keyword">this</strong>.memcachedConfiguration.getGroupPrefix()
<a name="309" href="#309">309</a>                     + Integer.toHexString(group.hashCode());
<a name="310" href="#310">310</a> 
<a name="311" href="#311">311</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="312" href="#312">312</a>                 <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"Original group '"</span>
<a name="313" href="#313">313</a>                         + group
<a name="314" href="#314">314</a>                         + <span class="jxr_string">"' encrypted to '"</span>
<a name="315" href="#315">315</a>                         + encrypted
<a name="316" href="#316">316</a>                         + <span class="jxr_string">"'"</span>);
<a name="317" href="#317">317</a>             }
<a name="318" href="#318">318</a> 
<a name="319" href="#319">319</a>             <strong class="jxr_keyword">return</strong> encrypted;
<a name="320" href="#320">320</a>         }
<a name="321" href="#321">321</a> 
<a name="322" href="#322">322</a>         <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.log.isDebugEnabled()) {
<a name="323" href="#323">323</a>             <strong class="jxr_keyword">this</strong>.log.debug(<span class="jxr_string">"No need to encrypt group '"</span>
<a name="324" href="#324">324</a>                     + group
<a name="325" href="#325">325</a>                     + <span class="jxr_string">"', just returning the original"</span>);
<a name="326" href="#326">326</a>         }
<a name="327" href="#327">327</a> 
<a name="328" href="#328">328</a>         <strong class="jxr_keyword">return</strong> group;
<a name="329" href="#329">329</a>     }
<a name="330" href="#330">330</a> 
<a name="331" href="#331">331</a> }
</pre>
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